Patents by Inventor Robert W. Walters

Robert W. Walters has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20110073849
    Abstract: Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1?,2?-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.
    Type: Application
    Filed: October 20, 2010
    Publication date: March 31, 2011
    Inventors: David B. KNOWLES, Chun Lin, Peter Borden MacKenzie, Jui-Yi Tsai, Robert W. Walters, Scott A. Beers, Cory S. Brown, Walter H. Yeager
  • Patent number: 7915415
    Abstract: Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1?,2?-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: March 29, 2011
    Assignee: Universal Display Corporation
    Inventors: David B. Knowles, Chun Lin, Peter Borden MacKenzie, Jui-Yi Tsai, Robert W. Walters, Scott A. Beers, Cory S. Brown, Walter H. Yeager
  • Publication number: 20110071198
    Abstract: The present invention relates, in general, to nicotinic acid receptor ligands and, in particular, to ligands that have a relative efficacy for activating a G-protein-coupled receptor function (e.g., signaling) that is greater than their relative efficacy for stimulating ?-arrestin function (e.g., recruitment and/or signaling). The invention further relates to the use of such “biased ligands” to decrease triglycerides levels and to potentially increase high density lipoprotein (HDL) levels in patients and potentially lower low density lipoprotein (LDL) and/or very low density lipoprotein (VLDL) levels. In addition, the invention relates to methods of identifying such “biased ligands”.
    Type: Application
    Filed: May 27, 2009
    Publication date: March 24, 2011
    Inventors: Robert J. Lefkowitz, Scott M. Dewire, Erin J. Whalen, Jonathan D. Violin, Robert W. Walters
  • Patent number: 7902374
    Abstract: Organic light emitting materials and devices comprising phosphorescent metal complexes comprising ligands comprising aryl or heteroaryl groups substituted at both ortho positions are described. An organic light emitting device, comprising: an anode; a hole transport layer; an organic emissive layer comprising an emissive layer host and an emissive dopant; an electron impeding layer; an electron transport layer; and a cathode disposed, in that order, over a substrate.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: March 8, 2011
    Assignee: Universal Display Corporation
    Inventors: Chun Lin, Peter B. Mackenzie, Robert W. Walters, Jui-Yi Tsai, Cory S. Brown, Jun Deng
  • Publication number: 20100134866
    Abstract: Provided is an optical element with an electrochromic apodized aperture having variable light transmittance in response to the amplitude of an applied voltage. The apodized aperture includes (i) a first substrate having a planar inner surface and an outer surface, (ii) a second substrate having an outer surface and a non-planar inner surface opposing and spaced from the planar inner surface of the first substrate, wherein each of the planar inner surface of the first substrate and the non-planar inner surface of the second substrate has an at least partial layer of transparent conductive material thereover; and (iii) an electrochromic medium disposed between the planar inner surface of the first substrate and the non-planar inner surface of the second substrate.
    Type: Application
    Filed: December 2, 2009
    Publication date: June 3, 2010
    Applicant: PPG INDUSTRIES OHIO, INC.
    Inventors: Peter C. Foller, Robert H. Tang, Forrest R. Blackburn, Robert W. Walters, Kevin W. Seybert
  • Patent number: 7560056
    Abstract: Described are contact lenses having photochromic materials within the central or pupillary area of the lens and methods for manufacturing such lenses. In one method, a photochromic amount of at least one photochromic material is added to the pupillary region of a casting mold containing a polymerizable monomer that can be at least partially cured before and/or after the addition. Another method involves providing an amount of polymerizable photochromic monomer for the pupillary region and an amount of polymerizable non-photochromic monomer for the remainder of the contact lens in a casting mold. The photochromic and non-photochromic monomers can differ by their degree of polymerization, viscosity and/or density.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: July 14, 2009
    Assignee: Transition Optical, Inc.
    Inventors: Barry Van Gemert, Anil Kumar, Frank P. Mallak, Robert W. Walters
  • Patent number: 7557208
    Abstract: Described are naphthols useful in the manufacture of novel indeno-fused photochromic naphthopyran materials.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: July 7, 2009
    Assignee: Transitions Optical, Inc.
    Inventors: Robert W. Walters, Anil Kumar, Clara E. Nelson, Anu Chopra
  • Publication number: 20090115322
    Abstract: The present invention relates to organic light emitting devices (OLEDs), and more specifically to phosphorescent organic materials used in such devices. More specifically, the present invention relates to emissive phosphorescent material which comprise at least one tridentate ligand bound to a metal center, wherein at least one of the bonds to the tridentate ligand is a carbon-metal bond.
    Type: Application
    Filed: September 29, 2008
    Publication date: May 7, 2009
    Inventors: Robert W. WALTERS, Jui-yi Tsai, Peter Borden Mackenzie, Scott Beers
  • Patent number: 7517982
    Abstract: Described are naphthols useful in the manufacture of novel indeno-fused photochromic naphthopyran materials.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: April 14, 2009
    Assignee: Transitions Optical, Inc.
    Inventors: Robert W. Walters, Anil Kumar, Clara E. Nelson, Anu Chopra
  • Publication number: 20090092854
    Abstract: The present invention relates to organic light emitting devices (OLEDs), and more specifically to phosphorescent organic materials used in such devices. More specifically, the present invention relates to emissive phosphorescent material which comprise at least one tridentate ligand bound to a metal center, wherein at least one of the bonds to the tridentate ligand is a carbon-metal bond.
    Type: Application
    Filed: October 4, 2007
    Publication date: April 9, 2009
    Inventors: Robert W. Walters, Jui-Yi Tsai, Peter Borden Mackenzie, Scott Beers
  • Publication number: 20090062533
    Abstract: Described are naphthols useful in the manufacture of novel indeno-fused photochromic naphthopyran materials.
    Type: Application
    Filed: November 11, 2008
    Publication date: March 5, 2009
    Applicant: TRANSITIONS OPTICAL, INC.
    Inventors: Robert W. Walters, Anil Kumar, Clara E. Nelson, Anu Chopra
  • Publication number: 20080297033
    Abstract: Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1?,2?-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting devices comprising these compounds are also described.
    Type: Application
    Filed: March 7, 2008
    Publication date: December 4, 2008
    Inventors: David B. KNOWLES, Chun Lin, Peter B. Mackenzie, Jui-Yi Tsai, Robert W. Walters, Scott Beers, Cory S. Brown, Walter Yeager, Edward Barron
  • Publication number: 20080125512
    Abstract: Described are contact lenses having photochromic materials within the central or pupillary area of the lens and methods for manufacturing such lenses. In one method, a photochromic amount of at least one photochromic material is added to the pupillary region of a casting mold containing a polymerizable monomer that can be at least partially cured before and/or after the addition. Another method involves providing an amount of polymerizable photochromic monomer for the pupillary region and an amount of polymerizable non-photochromic monomer for the remainder of the contact lens in a casting mold. The photochromic and non-photochromic monomers can differ by their degree of polymerization, viscosity and/or density.
    Type: Application
    Filed: February 7, 2008
    Publication date: May 29, 2008
    Applicant: TRANSITIONS OPTICAL, INC.
    Inventors: Barry Van Gemert, Anil Kumar, Frank P. Mallak, Robert W. Walters
  • Patent number: 7368072
    Abstract: Described are contact lenses having photochromic materials within the central or pupillary area of the lens and methods for manufacturing such lenses. In one method, a photochromic amount of at least one photochromic material is added to the pupillary region of a casting mold containing a polymerizable monomer that can be at least partially cured before and/or after the addition. Another method involves providing an amount of polymerizable photochromic monomer for the pupillary region and an amount of polymerizable non-photochromic monomer for the remainder of the contact lens in a casting mold. The photochromic and non-photochromic monomers can differ by their degree of polymerization, viscosity and/or density.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: May 6, 2008
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Barry Van Gemert, Anil Kumar, Frank P. Mallak, Robert W. Walters
  • Patent number: 7262295
    Abstract: Described are photochromic materials of indeno [2?,3?:3,4]naphtho[1,2-b]pyran structure, characterized in that they have a nitrogen or sulfur containing substituent at the 11-position ring atom, are substantially free of spiro-substituents at the 13-position and have been adapted to provide an increase in the sensitivity, visible lambda max or a combination thereof as measured in the Indenonaphthopyran Photochromic Performance Test. Optional substituents can be present at the other positions of the indeno [2?,3?:3,4]naphtho [1,2-b]pyran structure. Also described are naphthols used to produce the photochromic materials and photochromic articles that contain or that have coatings containing at least one of the novel photochromic materials or combinations thereof with other photochromic materials.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: August 28, 2007
    Assignee: Transitions Optical, Inc.
    Inventors: Robert W. Walters, Anil Kumar, Clara E. Nelson, Anu Chopra
  • Patent number: 7166357
    Abstract: Described are photochromic articles that include a substrate and a photochromic amount of at least one organic photochromic material (b) represented by graphic formula XIII adapted to change from an unactivated state to an activated state by exposure to radiation substantially in a wavelength range from 380 to 410 nanometers (nm) when measured over a wavelength range of from 380 to 700 nm. The photochromic articles demonstrate a photochromic response when activated behind an ultraviolet blocking transparency such as an automotive windshield. For example, the photochromic articles retain at least 12 percent of the activation measured as change in optical density or delta OD under outdoor simulating conditions in the Outdoor Test when tested under conditions simulating an eyeglass wearer behind an automotive windshield in the Behind the Windshield Test. Methods for producing the aforedescribed photochromic articles are also described.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: January 23, 2007
    Assignee: Transitions Optical, Inc.
    Inventors: Anil Kumar, Michael S. Misura, Robert W. Walters, Barry Van Gemert, Anu Chopra, Clara E. Nelson
  • Patent number: 7011897
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode, the emissive layer further comprising an emissive material having the structure: wherein each of the variables are defined herein.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: March 14, 2006
    Assignees: The University of Southern California, Universal Display Corporation
    Inventors: Mark E. Thompson, Peter Djurovich, Raymond Kwong, Yeh-Jiun Tung, David B. Knowles, Jason Brooks, Robert W. Walters, Bin Ma
  • Patent number: 6916554
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further comprises an emissive material having the structure: M may be a metal having an atomic weight greater than 40. R3 may be a substituent having a Hammett value less than about ?0.17, between about ?0.15 and 0.05, or greater than about 0.07. R5 may be H or any substituent. A may be a 5 or 6 member heteroaryl ring system. “m” may be at least 1. “n” may be at least zero. (X-Y) may be an ancillary ligand. The emissive material itself is also provided. The emissive material may have improved stability, and may provide a saturated blue emission.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: July 12, 2005
    Assignees: The University of Southern California, Universal Display Corporation
    Inventors: Bin Ma, Robert W. Walters, David B. Knowles, Raymond Kwong, Yeh-Jiun Tung, Peter I. Djurovich, Mark E. Thompson
  • Patent number: 6858327
    Abstract: Emissive materials are provided having the following structures: Devices incorporating the emissive materials are also provided.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: February 22, 2005
    Assignee: Universal Display Corporation
    Inventors: Jui-Yi Tsai, Robert W. Walters, Michael Barone
  • Publication number: 20040185255
    Abstract: Described are photochromic materials of indeno [2′,3′:3,4]naphtho[1,2-b]pyran structure, characterized in that they have a nitrogen or sulfur containing substituent at the 11-position ring atom, are substantially free of spiro-substituents at the 13-position and have been adapted to provide an increase in the sensitivity, visible lambda max or a combination thereof as measured in the Indenonaphthopyran Photochromic Performance Test. Optional substituents can be present at the other positions of the indeno [2′,3′:3,4]naphtho [1,2-b]pyran structure. Also described are naphthols used to produce the photochromic materials and photochromic articles that contain or that have coatings containing at least one of the novel photochromic materials or combinations thereof with other photochromic materials.
    Type: Application
    Filed: March 20, 2003
    Publication date: September 23, 2004
    Inventors: Robert W. Walters, Anil Kumar, Clara E. Nelson, Anu Chopra